<!DOCTYPE html>
<html lang="zh">
	<head>
		<meta charset="utf-8">
		<link rel="stylesheet" href="style.css">
		<title>44 文字下划线条动画按钮</title>
	</head>
	<body>
		<div class="app">
			<a href="javascript:;" class="btn44">Design</a>
		</div>
	</body>
</html>